2008年夏季广州大气消光系数与细粒子的关系  

Relationship Between Ambient Light Extinction Coefficient and Fine Particles in Guangzhou, 2008 Summer

作　　者：施展[1] 李远[2] 陶俊[2] 张仁健[3] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130026 [2]环境保护部华南环境科学研究所,广东广州510655 [3]中国科学院大气物理研究所,北京100029

出　　处：《中国粉体技术》2012年第3期6-9,共4页China Powder Science and Technology

基　　金：国家环境保护公益性行业科研专项;编号:200809143

摘　　要：为了解夏季广州大气中细粒子消光特性,利用浊度仪、黑碳仪和自动气象站获得散射系数μsp、吸收系数μap以及气象要素等观测数据,并利用采样器采集大气悬浮颗粒物PM2.5和PM1.0样品获取其质量浓度。结果表明,散射系数μsp、吸收系数μap和大气消光系数(μext=μsp+μap)的平均值分别为(226±111)、(53±20)、(280±125)Mm-1;大气悬浮颗粒PM2.5和PM1.0的质量浓度分别为(53.7±23.2)、(46.1±21.3)μg/m3;消光系数μext与PM2.5和PM1.0的相关性系数分别达到0.96和0.93;PM2.5和PM1.0的平均质量浓度消光效率分别为到5.2、5.5 m2/g,表明大气中小粒径的粒子对消光系数的影响更为明显。To obtain the extinction properties of fine particles in aerosol, light scattering μsp, absorption coefficient pap and selected meteorological factors were measured with a Nephelometer, an Aethalometer and an automatic weather station, respectively, in July 2008. In-situ PMz5 and PMI.0 mass concentrations were collected by two samplers. The results show that the average light scattering Ate.absorption coefficient μsp and light extinction eoefficient （μext=μsp±μap） are （226±111 ）, （53±20）, （280± 125） Mm^3, respectively. The mass concentrations of PM2.5 and PM2.5 are （53.7 ±23.2）, （46.1 ±21.3）μg/m^3. The correlation coefficients of PM2.5 to PM1.0 and PMto are 0.96 and 0.93. The mass extinction efficients of PMz5 and PMI.0 are 5.2, 5.5 m^2/g. It suggests that the smaller size particles have higher extinction efficiency than the larger ones.

关 键 词：散射系数 吸收系数 消光系数 悬浮颗粒 

分 类 号：X513[环境科学与工程—环境工程]